Recommendation: One way is to exhaust port of the exhaust valve and damper module cancel 70 ℃, into a single outlet louvers; second method is normally closed to the smoke dampers on each electric charge of changed often open 280 degrees off damper control module to the general monitoring module. Both methods achieve the same regulatory requirements Fire dampers, and the actual control is also very reliable. Exhaust fan is a high quality fan products damper machine, while its chassis assembly operations we should also pay attention to certain matters round damper, the only way to fully demonstrate its performance, then on smoke ventilation chassis assembly machine What are the main points, we detail below: hfd damper, Plumper ventilation equipment (certified), the damper is provided by Dezhou Plumper ventilation plant. Dezhou Plumper ventilation plant (0) is the leader in Dezhou, fans, ventilation equipment, over the years, the company implementing the scientific management, innovation and development, the principle of honesty and trustworthiness, and satisfy customer needs. Rich ventilation equipment in leadership with the staff warmly welcome all inquiries negotiations to create rich, ventilation a better future.